Insulator



CLARK,

(No Model.)

No. 306,718. Patented our. 21, 1884.

UNITED STATES PATENT @rrno EDUARD CLARK, OF JERSEY CITY, NEW" JERSEY.

INSULATOR.

SPECIFICATION forming part. of Letters Patent No. 306,718, dated October 21, 1884.

Application filed July 1, 188].

I0 (0 whom it may concern Be it known that I, EDUARD CLARK, of J ersey City, Hudson county, State of New Jersey, have invented certain new and useful Improvements in Insulators, of which the following is a specification.

My invention is an insulating-holder for electrical conductors, consisting of a socketed block and certain metallic supports adapted thereto, and. certain insulating means, as fully described hereinafter, whereby to secure the conductors so as to permit longitudinal adj ustment without allowing of their escape from the supports and maintain a perfect insulation between the support and the block.

In the drawings, Figurel isan elevation in part section of myimproved insulating-holder. Fig. 2 is a plan of Fig. 1. Fig. 8 illustrates a modified form of holder. Fig. 4 is a plan of Fig. 3. Fig. 5 is a part sectional view showing another modification. Fig. 6 is a detached view of one of the metallic supports.

The body A of the insulator is a wooden block, preferably of a generally cylindrical form, and with sockets or perforations 00, which are axially in line, as in Fig. 5, or side by side, as in Figs. 1 to 4. In any case the said sockets are separated from each other. The block is contracted below the outer ends or months of the sockets, and the shoulder g, formed by this contracting of the block, isinclined from the wide to the contracted portion, so that any moisture collecting on the block, instead of accumulating and hanging in drops 011 the shoulder and affording an electrical conducting-surface, will run readily off to the support to which. the block is attached.

The attachment may be effected in an y suitable manner. Preferably the block is turned with a stem, (1, adapted to an opening in the support, andin some cases threaded to secure a more effective attachment, or it maybe perforated to receive a pin to fasten it.

The supports B for the electrical conductors consist of rods or wires with stems 0, adapted to be inserted in the sockets a, and bent at the outer ends to form loopsf, spread at the curve to receive the conducting-wire, but closer to gether above this point, so as to spring open to admit the wire and then close over it, thus (No model.l

permitting it to be drawn longitudinally to make all proper adjustments, but also holding it securely against any tendency to jump or be drawn from its place.

The sockets w preferably extend completely through the block, either on horizontal lines, as in Figs. 3 and 4, or inclined in opposite directions, as in Figs. 1 and 2, and the stems a may be bent laterally at the ends to form hooks i, which securely hold the supports in place.

In place of using hard and expensive wood for the holder A, I may employ as cheap and porous wood as I can procure. and impregnate it with a noircondueting and water-repellent material. Thus the blocks, after being turned, are soaked in tar, paraffine, or other material or composition which will penetrate the pores, improve the non-cont'lucting qualities of the block, and make it water-repellent, so that moisture will not adhere to and collect on the surface and aii'ord a means for the escape of the electric current from the conductors.

To secure a better opening of the pores and a more thorough penetration of the blocks by the material, I prefer to put the blocks in a material solution or mixture, which is maintained in a hot state, thus increasing its fiu idity and its penetrating qualities and. opening the pores forits admission.

To more thoroughly insulate the supports B from the block, I form the sockets :0 larger in diameter than the stems c and surround the latter with a non-conducting or insulating ma terial or composition, 25. This insulation may be of any suitable character. I prefer, how ever, to use a composition consisting, mainly, of corundum and a suitable vehicle, as asphalt, tar, rubber solution, paraffine, &c. This composition may be inserted in the socket or applied to the stem as a paste, as shown in Fig. 1, or a strip of fabric may be coated with said composition and wrapped round the stem before its insertion in the socket, as shown in Fig. 6. The stem may be dipped in the material and then inserted in the socket, or the latter may be filled with the material and the stem then inserted.

The use of the surrounding insulating ma terial t is specially serviceable when the stems do not extend through the block, as shown in Fi 5, as the insulator serves to hold the sup- ICO ports in place nndpreventthem li-om slipping out? of the sockets.

To secure a better insulut ion the h'loek may be coated orpnintied with the above-described insulating composition.

\Vithout limiting myself to the precise eonst'rnet'ion of block or supp orts sho w n, l elui m.-

.1. An insulatororsupporbl'orelectrical eon- (luehors consisting of :1 block of wood reeessed to receive the shanks ol' metnlliosupports, suid recesses Containing insulating material around the supports and contracted below the recesses to form an inclined shoulder, for the purpose set i'orth.

The wooden block A, hnving recesses eon mining supports em l'ledifled in insulating mute riul adapted to hold the supports ol' vleei riiul conductors and saturated with an insnlnting and wuter-repellent material or eomposition, substantially as deserihed.

3. The insulator-block A, having sockets .r, in eolnbinution with metallic supports ill, :11- ronged on opposite sides of'the block, and huving shanks adopted to said soekets, snhstjnn- 5 tially as described. v

i. The combination of the soeketed wooden block A, supports B, having shanks adopted to the sockets, nnd nn intervening body, "I. of the insulating mnteriul, consisting of eorunl dum and a suitable vehicle, substantially us deseril ml. 1

.lhe eonihinution ol the wooden liloek und metallic supportsseeured thereto und hunt to form supportirig-loops]; the sides of "which are nearer together fll)0\'( thelooped piintion, suhsluntiinlly us described.

ii. The ('omhinnl ion ol'the hloek having soekets extendingthrough the sznneumd 1notnllie supports having shanks extending, through the sockets and henl ut the ends, snhsluntinlly jeetion integrnl tlun'ewilh, 11nd-line-sup| mi- .ing' hooks embedded in the liloek.

.len t'estinnniy whereof I lllH't signed my uulne to this speeitieutvion in the preseni-e ot two suhserihing witnesses.

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